CN106593367B - The starting method of heavy crude reservoir steam assisted gravity drainage - Google Patents
The starting method of heavy crude reservoir steam assisted gravity drainage Download PDFInfo
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Abstract
The present invention provides a kind of starting methods of heavy crude reservoir steam assisted gravity drainage.The starting method is the following steps are included: step S1, to steam injection well and producing well inject cyclic steam respectively；Step S2, it injects after cyclic steam, while injecting the solvent for reducing viscosity of crude to the both ends of steam injection well horizontal segment and the both ends of producing well horizontal segment；Step S3, it injects after solvent, while injecting steam to the both ends of steam injection well horizontal segment and the both ends of producing well horizontal segment；Step S4, after injecting steam, drain is carried out to steam injection well and producing well, then the fluid-mixing including solvent and steam to the both ends of steam injection well horizontal segment and the injection of the both ends of producing well horizontal segment simultaneously；Step S5, it injects after fluid-mixing, to the both ends steam injection of steam injection well horizontal segment, and the other end drain to one end steam injection of producing well horizontal segment, to producing well horizontal segment.Above-mentioned starting method has the advantages that low energy consumption quick start.
Description
Technical field
The present invention relates to field of petroleum exploitation, in particular to a kind of opening for heavy crude reservoir steam assisted gravity drainage
Dynamic method.
Background technique
Steam assisted gravity drainage techniques (referred to as: SAGD) are that Canada Bulter in 1978 is invented, in Canadian oil
The heavy crude reservoir on the ground such as placer area, the Liaohe Oil Field in China, Xinjiang Oilfield is applied successfully.Its principle is in same oil reservoir
The horizontal well pair that deployment is stacked up and down, injects high-quality steam in the steam injection well of top, steam is far smaller than crude oil due to density
And onlap forms vapor chamber in the earth formation upwards, and with the continuous injection of steam, the continuous upward and sideways expansion of vapor chamber, with oil
Heat exchange occurs for the crude oil in layer.The viscosity of crude being heated reduces, and flows downward under the effect of gravity with condensed water, from oil reservoir
It is produced in the horizontal production well of lower part.
Before carrying out SAGD production, it is necessary to carry out thermal cycle starting to well.From injecting steam into producing well and steam injection well
It is known as startup stage or warm-up phase to starting to switch to SAGD and exploit this stage.The target of warm-up phase is most in short-term
In, it realizes being evenly heated for oil reservoir, is evenly heated steam injection well with producing well and is connected to, establish and let out between steam injection well and producing well
Oily channel.In SAGD startup stage, SAGD starting at present usually has handle up two kinds of pipeline start up by preheating and steam injected cycle preheating starting
Method, wherein pipeline start up by preheating injection pressure of handling up is high, temperature is high, is easy to damage completion interval of well body structure.Steam injected cycle
Pipeline start up by preheating homogeneous heating, starting is steady, and be generally divided into three steps: (1) steam recycles in Liang Koujing, and reservoir mainly passes through hot biography
It leads to transmit heat；Pressure difference between well is formed between (2) two wells, steam injection well pressure is higher than producing well, makes between well crude oil toward producing well
Flowing is prepared to be transferred to complete SAGD production；(3) steamed well annular space in top stops drain, and lower part producing well stops note
Steam is transferred to the complete SAGD production phase.
For conventional steam injected cycle preheating, horizontal segment tiptoe is protruded into tripping in one in steam injection well and production well shaft
Long oil pipe and a short oil pipe for protruding into horizontal segment heel, steam is respectively out of top steam injection well and lower part production well shaft
Long oil pipe injection, then produced respectively from the short oil pipe in top steam injection well and lower part production well shaft.By injection steam and oil
Layer between heat transfer, thermal convection effect heating steam injection well and producing well between oil reservoir, reduce viscosity of crude to 150 centipoises with
Under, with preferable mobility, thus after being transferred to the SAGD production phase, it is former in the oil reservoir between steam injection well and producing well
It is oily can smooth flow simultaneously form drain path, vapor chamber is constantly extended, crude oil can constantly under let out and be plucked out of.
But conventional steam injected cycle preheating method, the shadow by thermal physical property parameters such as oil reservoir thermal conductivity, thermal diffusion coefficients
It rings, it is slow that straight steam cycle preheats heating speed, it usually needs steam injected cycle preheating 150-300 days, original in oil reservoir between injection-production well
Oil viscosity can be only achieved 150 centipoises or less.Since the steam that be discharged from short oil pipe of circulation preheating requirement is done at least 10%
Degree is usually above 80%, particularly with deeper oil reservoir is buried, then along journey therefore it is required that the well head steam quality of injection steam is higher
Steam quality heat loss is bigger, and well head steam quality usually requires to reach 100%.Therefore, it will be consumed in loop preheat phase big
The steam of amount and a large amount of thermal energy, cause SAGD preheating time too long, and initial stage cost of winning is high, and upper production speed is slow.
Summary of the invention
The main purpose of the present invention is to provide a kind of starting methods of heavy crude reservoir steam assisted gravity drainage, to solve
The problem for the length of high and preheating time that consumes energy in existing starting method.
To achieve the goals above, the present invention provides a kind of starting method of heavy crude reservoir steam assisted gravity drainage,
The starting method is the following steps are included: step S1, to steam injection well and producing well inject cyclic steam respectively；Step S2, injection follows
After ring steam, while injecting to the both ends of steam injection well horizontal segment and the both ends of producing well horizontal segment for reducing viscosity of crude
Solvent；Step S3, it injects after solvent, while injecting and steaming to the both ends of steam injection well horizontal segment and the both ends of producing well horizontal segment
Vapour；Step S4, after injecting steam, drain is carried out to steam injection well and producing well, then the both ends to steam injection well horizontal segment and life simultaneously
The both ends injection for producing well horizontal segment includes the fluid-mixing of solvent and steam；Step S5, it injects after fluid-mixing, to steam injection well
The both ends steam injection of horizontal segment, and the other end drain to one end steam injection of producing well horizontal segment, to producing well horizontal segment.
Further, before step S1, stretched into steam injection well one end of steam injection well horizontal segment steam injection long tube and
The steam injection short tube for stretching to the other end of steam injection well horizontal segment and being parallel to each other with steam injection long tube, and life is stretched into producing well
It produces the production long tube of one end of well horizontal segment and stretches to the other end of producing well horizontal segment and be parallel to each other with production long tube
Production short tube.
Further, step S1 includes: that steam is injected by steam injection long tube and produced by steam injection short tube, while steam is by producing
Long tube is injected and is produced by production short tube.
Further, the time for injecting cyclic steam is 20~30 days.
Further, type of solvent is the mixture of toluene, dimethylbenzene, diesel oil and surfactant, wherein toluene, diformazan
Ratio between the volume of the volume and surfactant of benzene and diesel oil is 100~1000:1, and surfactant is C12-16 alkane
Base glucosides.
Further, in step S2, the injection rate of steam injection well and producing well is 100~300 ton/days, wherein steam injection
The ratio between injection rate of long tube and steam injection short tube is 1:0.8~1.2, and the ratio between production long tube and the injection rate for producing short tube are 1:
0.8~1.2.
Further, when injection pressure is to 0.2~0.5MPa, stop injecting simultaneously stewing well 2~3 days.
Further, in step S3, the injection rate of steam injection well and producing well is 100~200 ton/days, wherein steam injection
The ratio between injection rate of long tube and steam injection short tube is 7:1~5, production long tube and produce the ratio between injection rate of short tube for 7:1~
5。
Further, when injection pressure is to 0.2~0.5MPa, stop injecting simultaneously stewing well 2~3 days.
Further, it in step S4, opens steam injection short tube and production short tube carries out drain, until between steam injection well and producing well
Pressure difference when being down to strata pressure, inject fluid-mixing, the mass ratio of solvent and steam is 1:1~3 in fluid-mixing.
Further, when injection pressure is to 0.2~0.5MPa, stop injecting simultaneously stewing well 2~5 days.
Further, in step S5, steam injection long tube and steam injection short tube steam injection, and production long tube steam injection simultaneously produce short tube
Drain 10~15 days.
Further, after step S5, steam injection long tube and steam injection short tube steam injection are closed, and closes production long tube steam injection and life
Short tube drain is produced, into the SAGD production phase.
The starting method of heavy crude reservoir steam assisted gravity drainage provided by the invention has the excellent of low energy consumption quick start
Point.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the starting method for the heavy crude reservoir steam assisted gravity drainage that embodiment provides according to the present invention
Schematic diagram.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
The present invention provides a kind of starting methods of heavy crude reservoir steam assisted gravity drainage.As shown in Figure 1, the starting side
Method is the following steps are included: step S1, to steam injection well and producing well inject cyclic steam respectively；Step S2, injection cyclic steam it
Afterwards, while to the both ends of steam injection well horizontal segment and the both ends of producing well horizontal segment the solvent for reducing viscosity of crude is injected；Step
After rapid S3, injection solvent, while steam is injected to the both ends of steam injection well horizontal segment and the both ends of producing well horizontal segment；Step
After S4, injection steam, drain is carried out to steam injection well and producing well, then horizontal to the both ends of steam injection well horizontal segment and producing well simultaneously
The both ends injection of section includes the fluid-mixing of solvent and steam；Step S5, it injects after fluid-mixing, to steam injection well horizontal segment
Both ends steam injection, and the other end drain to one end steam injection of producing well horizontal segment, to producing well horizontal segment.
Above-mentioned starting method has following technical effect that (1) SAGD starting method provided by the present invention, first in steam injection
Steam injected cycle is carried out in well and producing well, after near wellbore heating, high speed is injected simultaneously into steam injection well and producing well
Hot solvent, and stewing well extends moveable oil band, since near wellbore temperature is higher, solvent rapidly enters near wellbore oil reservoir,
Further molten oily viscosity reduction, expansion involve radius.With it is conventional always using steam circulation compared with, greatly save vapour amount, improve thermal effect
Rate.(2) pass through solvent soaking, after solvent is sufficiently spread, steam is injected simultaneously in steam injection well and producing well, until pressure is close broken
Split pressure at this point, injection steam can further promote solvent molecule to go deep into oil reservoir, molten oil viscosity reduction, while having thermal diffusion radius
There is adjustment effect, increases the uniformity of seepage channel between injection-production well.(3) steam injection well and producing well open short tube drain, can be discharged
It forms the hot oil and condensate liquid in moveable oil band early period, steam extending space is sufficiently provided, after drain, again with certain
Ratio high pressure injects solvent and steam fluid-mixing, and sufficiently after heat exchange and viscosity reduction, steam injection well starts Double-pipe gas-injection, and producing well is long
Pipe steam injection, short tube drain, which can guarantee in the case where not forming preferential seepage channel, further expand heating radius,
Strengthen and increase seepage channel, creates conditions for the high yield in reincarnation postpartum.(4) preheating starting method phase is recycled with routine SAGD
Than, the above method proposed by the present invention, overall preheating time only needs 60-70 days, and fewer than conventional preheating starting method 1/2
The above time can be improved SAGD pipeline start up by preheating speed, accelerate and produce speed on SAGD to substantially increase heat utilization rate.
The starting method of the heavy crude reservoir steam assisted gravity drainage provided according to the present invention is provided
Illustrative embodiments.However, these illustrative embodiments can be implemented by many different forms, and should not
It is interpreted to be only limited to embodiments set forth herein.It should be understood that thesing embodiments are provided so that this
The disclosure of application is thoroughly and complete, and the design of these illustrative embodiments is fully conveyed to ordinary skill people
Member.
In the starting method of heavy crude reservoir steam assisted gravity drainage provided by the invention, before step S1, to steam injection well
It inside stretches to the steam injection long tube of one end of steam injection well horizontal segment and stretches to the other end of steam injection well horizontal segment and long with steam injection
The steam injection short tube that pipe is parallel to each other, and stretch into producing well the production long tube of one end of producing well horizontal segment and stretch to
The other end of producing well horizontal segment and the production short tube being parallel to each other with production long tube.And electric thermo-couple temperature monitoring pipe and
Survey dabbing tubule.
Wherein, step S1 includes: that steam is injected by steam injection long tube and produced by steam injection short tube, while steam is by production long tube
It injects and is produced by production short tube.Preferably, the time for injecting cyclic steam is 20~30 days.
In step S2, it is preferable that type of solvent is the mixture of toluene, dimethylbenzene, diesel oil and surfactant, wherein first
Ratio between benzene, the volume of dimethylbenzene and diesel oil and the volume of surfactant is 100~1000:1, and surfactant is
C12-16 alkyl glycosides.The injection rate of steam injection well and producing well is 100~300 ton/days, wherein steam injection long tube and steam injection
The ratio between injection rate of short tube is 1:0.8~1.2, and the ratio between production long tube and the injection rate for producing short tube are 1:0.8~1.2.
Further, when injection pressure is to 0.2~0.5MPa, stop injecting simultaneously stewing well 2~3 days.
In step S3, it is preferable that the injection rate of steam injection well and producing well is 100~200 ton/days, wherein steam injection is long
The ratio between injection rate of pipe and steam injection short tube is 7:1~5, and the ratio between production long tube and the injection rate for producing short tube are 7:1~5.
When injection pressure is to 0.2~0.5MPa, stop injecting simultaneously stewing well 2~3 days.
In step S4, opens steam injection short tube and production short tube carries out drain, until the pressure difference between steam injection well and producing well drops
When to strata pressure, fluid-mixing is injected, the mass ratio of solvent and steam is 1:1~3 in fluid-mixing.Further, it injects
When pressure is to 0.2~0.5MPa, stop injecting simultaneously stewing well 2~5 days.
In step S5, steam injection long tube and steam injection short tube steam injection, and production long tube steam injection simultaneously produce short tube drain 10~15
It.
After step S5, steam injection long tube and steam injection short tube steam injection are closed, and closes production long tube steam injection and production short tube row
Liquid, into the SAGD production phase.
The starting of heavy crude reservoir steam assisted gravity drainage provided by the invention is further illustrated below in conjunction with embodiment
Method.
Apply example 1
The present embodiment provides a kind of starting method of heavy crude reservoir steam assisted gravity drainage, steam injection well and production well shaft
The long oil pipe of horizontal segment tiptoe is protruded into interior equal tripping in one and one is protruded into horizontal segment heel and is parallel to each other with long oil pipe short
Oil pipe and an electric thermo-couple temperature monitoring pipe and survey dabbing tubule.Heavy crude reservoir steam assisted gravity provided in this embodiment
The starting method of draining comprising the following specific steps
(1) steam injected cycle preheating, circulation time are 25 days simultaneously for steam injection well and producing well.
(2) solvent is injected simultaneously into steam injection well and the long oil pipe of producing well and short oil pipe, type of solvent is toluene, diformazan
The mixture of benzene, diesel oil and surfactant is (wherein between toluene, dimethylbenzene, the volume of diesel oil and the volume of surfactant
Ratio be 100:1, surfactant types be C12-16 alkyl glycosides), solvent temperature be the formation pressure under saturation steam
Stripping temperature, selected solvent are under formation pressure and the corresponding saturated-steam temperature of the pressure, to reducing crude oil viscosity amplitude highest
Solvent or dicyandiamide solution；The total injection rate of individual well solvent is 120 ton/days, and long oil pipe and short oil pipe injection rate are 1:1, note
Enter pressure highest to stop infusing close to after oil breakdown pressure 0.2Mpa, boil in a covered pot over a slow fire well 2 days.
(3) steam, steam injection mass dryness fraction 100%, steam injection well are injected simultaneously into steam injection well and the long oil pipe of producing well and short oil pipe
With 120 ton/days of producing well individual well injection rate, long oil pipe and short oil pipe injection ratio are 7:3, and injection pressure highest is close to oil reservoir
When fracture pressure 0.3MPa, stop infusing stewing well 3 days；
(4) steam injection well and producing well open short tube drain, and pressure difference remains 0.3-0.5Mpa, pressure drop between injection-production well
When to close to strata pressure, steam injection well and producing well long tube and short tube infuse solvent-steam fluid-mixing (mass ratio 1:2) simultaneously,
Stop to infuse close to after fracture pressure, boil in a covered pot over a slow fire well 3 days；
(5) steam injection, producing well long tube steam injection short tube drain 15 days, are infused during drain and are adopted simultaneously for steam injection well long tube and short tube
Pressure difference remains 0-0.3Mpa between well；
(6) producing well long tube steam injection, steam injection well steam injection, producing well drain, into the SAGD production phase are closed.
Compared with adjacent S AGD well is to using conventional steam injected cycle preheating starting method, the present embodiment totality preheating time
65 days only are needed, it is fewer than conventional preheating starting method 1/2 or more time (conventional method: 140 days), to substantially increase heat
Energy utilization rate accelerates, it can be achieved that the starting of SAGD rapidly pre-warming and produces speed on SAGD.
Embodiment 2
The present embodiment provides a kind of starting method of heavy crude reservoir steam assisted gravity drainage, steam injection well and production well shaft
The long oil pipe of horizontal segment tiptoe is protruded into interior equal tripping in one and one is protruded into horizontal segment heel and is parallel to each other with long oil pipe short
Oil pipe and an electric thermo-couple temperature monitoring pipe and survey dabbing tubule.Heavy crude reservoir steam assisted gravity provided in this embodiment
The starting method of draining comprising the following specific steps
(1) steam injected cycle preheating, circulation time are 30 days simultaneously for steam injection well and producing well.
(2) solvent is injected simultaneously into steam injection well and the long oil pipe of producing well and short oil pipe, type of solvent is toluene, diformazan
The mixture of benzene, diesel oil and surfactant is (wherein between toluene, dimethylbenzene, the volume of diesel oil and the volume of surfactant
Ratio be 1000:1, surfactant types be C12-16 alkyl glycosides), solvent temperature be the formation pressure under saturation steam
Stripping temperature, selected solvent are under formation pressure and the corresponding saturated-steam temperature of the pressure, to reducing crude oil viscosity amplitude highest
Solvent or dicyandiamide solution；The total injection rate of individual well solvent is 100 ton/days, and long oil pipe and short oil pipe injection rate are 1:1, note
Enter pressure highest to stop infusing close to after oil breakdown pressure 0.2Mpa, boil in a covered pot over a slow fire well 2 days.
(3) steam, steam injection mass dryness fraction 100%, steam injection well are injected simultaneously into steam injection well and the long oil pipe of producing well and short oil pipe
With 130 ton/days of producing well individual well injection rate, long oil pipe and short oil pipe injection ratio are 7:3, and injection pressure highest is close to oil reservoir
When fracture pressure 0.4MPa, stop infusing stewing well 2 days；
(4) steam injection well and producing well open short tube drain, and pressure difference remains 0.2-0.4Mpa, pressure drop between injection-production well
When to close to strata pressure, steam injection well and producing well long tube and short tube infuse solvent-steam fluid-mixing (mass ratio 1:2) simultaneously,
Stop to infuse close to after fracture pressure, boil in a covered pot over a slow fire well 3 days；
(5) steam injection, producing well long tube steam injection short tube drain 13 days, are infused during drain and are adopted simultaneously for steam injection well long tube and short tube
Pressure difference remains 0.1-0.4Mpa between well；
(6) producing well long tube steam injection, steam injection well steam injection, producing well drain, into the SAGD production phase are closed.
Compared with adjacent S AGD well is to using conventional steam injected cycle preheating starting method, the present embodiment totality preheating time
70 days only are needed, it is fewer than conventional preheating starting method 1/2 or more time (conventional method: 160 days), to substantially increase heat
Energy utilization rate accelerates, it can be achieved that the starting of SAGD rapidly pre-warming and produces speed on SAGD.
As can be seen from the above embodiments, the above-mentioned example of the present invention realizes following technical effect: above-mentioned starting method
It has following technical effect that
(1) SAGD provided by the present invention starts method, and steam injection in 20-30 days is carried out first in steam injection well and producing well
Circulation, after near wellbore heating, the hot solvent of high speed injection simultaneously into steam injection well and producing well, and stewing well extends moveable oil
Band, since near wellbore temperature is higher, solvent rapidly enters near wellbore oil reservoir, and further molten oily viscosity reduction, expansion involve
Radius.With it is conventional always using steam circulation compared with, greatly save vapour amount, improve the thermal efficiency.
(2) the solvent soaking for passing through 2-3 days after solvent is sufficiently spread, injects steam in steam injection well and producing well, directly simultaneously
To pressure close to fracture pressure, at this point, injection steam can further promote solvent molecule to go deep into oil reservoir, molten oil viscosity reduction, at the same it is right
Thermal diffusion radius has adjustment effect, increases the uniformity of seepage channel between injection-production well.
(3) steam injection well and producing well open short tube drain, and the hot oil and condensate liquid formed in moveable oil band early period can be discharged,
Steam extending space is sufficiently provided, after drain, solvent and steam fluid-mixing (matter are injected with certain proportion high pressure again
Amount is than 1:2), stop to infuse close to after fracture pressure, boil in a covered pot over a slow fire well 2-5 days, sufficiently after heat exchange and viscosity reduction, steam injection well starts Double-pipe gas-injection, raw
Well long tube steam injection is produced, short tube drain, which can guarantee in the case where not forming preferential seepage channel, further expand heating
Radius is strengthened and is increased seepage channel, creates conditions for the high yield in reincarnation postpartum.
(4) compared with conventional SAGD recycles preheating starting method, the above method proposed by the present invention, overall preheating time is only
60-70 days are needed, fewer than conventional preheating starting method 1/2 or more time can mention to substantially increase heat utilization rate
High SAGD pipeline start up by preheating speed, accelerates and produces speed on SAGD.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (13)
1. a kind of starting method of heavy crude reservoir steam assisted gravity drainage, which is characterized in that the starting method includes following
Step:
Step S1, cyclic steam is injected to steam injection well and producing well respectively；
Step S2, it injects after cyclic steam, while to the both ends of the steam injection well horizontal segment and the producing well horizontal segment
The solvent that both ends are injected for reducing viscosity of crude；
Step S3, it injects after the solvent, while to the both ends of the steam injection well horizontal segment and the producing well horizontal segment
Steam is injected at both ends；
Step S4, after injecting the steam, drain is carried out to the steam injection well and the producing well, then simultaneously to the steam injection well
The both ends of horizontal segment and the injection of the both ends of the producing well horizontal segment include the fluid-mixing of the solvent and steam；
Step S5, it injects after the fluid-mixing, the both ends steam injection of Xiang Suoshu steam injection well horizontal segment, and to the production well water
One end steam injection of flat section, the other end drain to the producing well horizontal segment.
2. starting method according to claim 1, which is characterized in that before the step S1, stretched into steam injection well
The steam injection long tube of one end of the steam injection well horizontal segment and stretch to the steam injection well horizontal segment the other end and with the note
The steam injection short tube that vapour long tube is parallel to each other, and stretch into producing well the producing well horizontal segment one end production long tube with
And the production short tube for stretching to the other end of the producing well horizontal segment and being parallel to each other with the production long tube.
3. starting method according to claim 2, which is characterized in that the step S1 includes: that steam is long by the steam injection
Pipe injection is simultaneously produced by the steam injection short tube, while steam is injected by the production long tube and produced by the production short tube.
4. starting method according to claim 1, which is characterized in that the time for injecting the cyclic steam is 20~30
It.
5. starting method according to claim 1, which is characterized in that the type of solvent be toluene, dimethylbenzene, diesel oil and
The mixture of surfactant, wherein the ratio between the volume of toluene, dimethylbenzene and diesel oil and the volume of surfactant be
100~1000:1, the surfactant are C12-16 alkyl glycosides.
6. starting method according to claim 2, which is characterized in that in the step S2, the steam injection well and the life
The injection rate for producing well is 100~300 ton/days, wherein the ratio between injection rate of the steam injection long tube and steam injection short tube is 1:
0.8~1.2, the ratio between the production long tube and the injection rate for producing short tube are 1:0.8~1.2.
7. starting method according to claim 6, which is characterized in that when injection pressure is to 0.2~0.5MPa, stop injection
And stewing well 2~3 days.
8. starting method according to claim 2, which is characterized in that in the step S3, the steam injection well and the life
The injection rate for producing well is 100~200 ton/days, wherein the ratio between injection rate of the steam injection long tube and steam injection short tube is 7:
1~5, the ratio between the production long tube and the injection rate for producing short tube are 7:1~5.
9. starting method according to claim 8, which is characterized in that when injection pressure is to 0.2~0.5MPa, stop injection
And stewing well 2~3 days.
10. starting method according to claim 2, which is characterized in that in the step S4, open the steam injection short tube and
The production short tube carries out the drain, until when the pressure difference between the steam injection well and the producing well is down to strata pressure, note
Enter the fluid-mixing, the mass ratio of solvent and steam is 1:1~3 in the fluid-mixing.
11. starting method according to claim 10, which is characterized in that when injection pressure is to 0.2~0.5MPa, stop note
Enter and boils in a covered pot over a slow fire well 2~5 days.
12. starting method according to claim 2, which is characterized in that in the step S5, the steam injection long tube and described
Steam injection short tube steam injection, and the production long tube steam injection simultaneously, described the drain of production short tube 10~15 days.
13. starting method according to claim 12, which is characterized in that after the step S5, it is long to close the steam injection
Pipe and the steam injection short tube steam injection, and the production long tube steam injection and the production short tube drain are closed, rank is produced into SAGD
Section.
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| CN107806336B (en) * | 2016-09-09 | 2020-02-14 | 中国石油天然气股份有限公司 | Steam assisted gravity drainage starting method |
| CN107401397B (en) * | 2017-09-07 | 2019-11-08 | 中国石油天然气股份有限公司 | The method for communicating of dual horizontal well |
| CN109138976B (en) * | 2018-07-23 | 2022-01-04 | 中国石油天然气股份有限公司 | Method for judging time for converting double-horizontal-well preheating into SAGD (steam assisted gravity drainage) and double-horizontal-well preheating device |
| CN111119820B (en) * | 2018-10-30 | 2022-08-05 | 中国石油天然气股份有限公司 | SAGD oil recovery method |
| CN112443302A (en) * | 2019-08-28 | 2021-03-05 | 中国石油天然气股份有限公司 | SAGD production method |
| CN115387767A (en) * | 2021-05-20 | 2022-11-25 | 中国石油化工股份有限公司 | Steam huff-puff effect-inducing superposition viscosity reducer flooding method for deep extra-heavy oil reservoir |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2819707C (en) * | 2011-03-07 | 2013-11-12 | Conocophillips Company | A method for accelerating start-up for steam-assisted gravity drainage (sagd) operations |
| CN103615224A (en) * | 2013-11-08 | 2014-03-05 | 中国石油天然气股份有限公司 | Method and well network structure for improving steam assisted gravity drainage for extracting heavy oil reservoirs by aid of solvents |
| CN104165046A (en) * | 2013-05-31 | 2014-11-26 | 微能地质科学工程技术有限公司 | Rapid and even SAGD starting enhancing method |
| CN104453805A (en) * | 2014-10-28 | 2015-03-25 | 中国石油天然气股份有限公司 | Rapid start method for heavy oil reservoir steam assisted gravity drainage |
| CN104500014A (en) * | 2014-12-25 | 2015-04-08 | 西南石油大学 | Mining method of thickened oil dual horizontal well |
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| US9033039B2 (en) * | 2012-02-22 | 2015-05-19 | Conocophillips Canada Resources Corp. | Producer snorkel or injector toe-dip to accelerate communication between SAGD producer and injector |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2819707C (en) * | 2011-03-07 | 2013-11-12 | Conocophillips Company | A method for accelerating start-up for steam-assisted gravity drainage (sagd) operations |
| CN104165046A (en) * | 2013-05-31 | 2014-11-26 | 微能地质科学工程技术有限公司 | Rapid and even SAGD starting enhancing method |
| CN103615224A (en) * | 2013-11-08 | 2014-03-05 | 中国石油天然气股份有限公司 | Method and well network structure for improving steam assisted gravity drainage for extracting heavy oil reservoirs by aid of solvents |
| CN104453805A (en) * | 2014-10-28 | 2015-03-25 | 中国石油天然气股份有限公司 | Rapid start method for heavy oil reservoir steam assisted gravity drainage |
| CN104500014A (en) * | 2014-12-25 | 2015-04-08 | 西南石油大学 | Mining method of thickened oil dual horizontal well |
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